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math/example/nonfinite_num_facet_serialization.cpp
Paul A. Bristow ce3c4d20c7 Added new nonfinite facets examples. 
[SVN r71284]
2011-04-15 14:42:50 +00:00

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/** nonfinite_num_facet_serialization.cpp
*
* Copyright (c) 2011 Francois Mauger
* Copyright (c) 2011 Paul A. Bristow
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt
* or copy at http://www.boost.org/LICENSE_1_0.txt)
*
* This sample program illustrates how to use the
* `boost/math/nonfinite_num_facets.hpp' material from the original
* Floating Point Utilities contribution by Johan Rade. Here it is
* shown how non finite floating number can be serialized and
* deserialized from I/O streams and/or Boost text/XML archives. It
* produces two archives stored in `test.txt' and `test.xml' files.
*
* Tested with Boost 1.44, gcc 4.4.1, Linux/i686 (32bits)
*
*/
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable : 4224) // formal parameter 'version' was previously defined as a type
# pragma warning(disable : 4100) // unreferenced formal parameter
#endif
#include <iostream>
#include <sstream>
#include <fstream>
#include <limits>
#include <boost/cstdint.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/codecvt_null.hpp>
// from Johan Rade Floating Point Utilities :
#include <boost/math/special_functions/nonfinite_num_facets.hpp>
/* A class with a float and a double */
struct foo
{
foo () : fvalue (3.141593F), dvalue (3.14159265358979) {}
// set the values at -infinity :
void minus_infinity ()
{
fvalue = -std::numeric_limits<float>::infinity ();
dvalue = -std::numeric_limits<double>::infinity ();
return;
}
// set the values at +infinity :
void plus_infinity ()
{
fvalue = +std::numeric_limits<float>::infinity ();
dvalue = +std::numeric_limits<double>::infinity ();
return;
}
// set the values at NaN :
void nan ()
{
fvalue = +std::numeric_limits<float>::quiet_NaN ();
dvalue = +std::numeric_limits<double>::quiet_NaN ();
return;
}
// print :
void print (std::ostream & a_out, const std::string & a_title)
{
if (a_title.empty ()) a_out << "foo";
else a_out << a_title;
a_out << " : " << std::endl;
a_out << "|-- " << "fvalue = ";
a_out.precision (7);
a_out << fvalue << std::endl;
a_out << "`-- " << "dvalue = ";
a_out.precision (15);
a_out << dvalue << std::endl;
return;
}
// I/O operators :
friend std::ostream & operator<< (std::ostream & a_out, const foo & a_foo);
friend std::istream & operator>> (std::istream & a_in, foo & a_foo);
// Boost serialization :
template <class Archive>
void serialize (Archive & ar, int version)
{
ar & BOOST_SERIALIZATION_NVP (fvalue);
ar & BOOST_SERIALIZATION_NVP (dvalue);
return;
}
// Attributes :
float fvalue; // single precision floating number
double dvalue; // double precision floating number
};
std::ostream & operator<< (std::ostream & a_out, const foo & a_foo)
{
a_out << "(" << a_foo.fvalue << ";" << a_foo.dvalue << ")";
return a_out;
}
std::istream & operator>> (std::istream & a_in, foo & a_foo)
{
char c = 0;
a_in.get (c);
if (c != '(')
{
std::cerr << "ERROR: operator>> No ( " << std::endl;
a_in.setstate(std::ios::failbit);
return a_in;
}
float f;
a_in >> std::ws >> f;
if (! a_in)
{
return a_in;
}
a_in >> std::ws;
a_in.get (c);
if (c != ';')
{
std::cerr << "ERROR: operator>> c='" << c << "'" << std::endl;
std::cerr << "ERROR: operator>> No ; " << std::endl;
a_in.setstate(std::ios::failbit);
return a_in;
}
double d;
a_in >> std::ws >> d;
if (! a_in)
{
return a_in;
}
a_in >> std::ws;
a_in.get (c);
if (c != ')')
{
std::cerr << "ERROR: operator>> No ) " << std::endl;
a_in.setstate(std::ios::failbit);
return a_in;
}
a_foo.fvalue = f;
a_foo.dvalue = d;
return a_in;
}
int main (void)
{
std::clog << "Hello Booster !" << std::endl
<< "This is the `test_nonfinite_num_facets_1.cpp' sample program !" << std::endl;
std::locale the_default_locale (std::locale::classic (),
new boost::archive::codecvt_null<char>);
{
std::clog << "Write to some string buffer..." << std::endl;
foo f0;
foo f1; f1.minus_infinity ();
foo f2; f2.plus_infinity ();
foo f3; f3.nan ();
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
std::ostringstream oss;
std::locale the_out_locale (the_default_locale, new boost::math::nonfinite_num_put<char>);
oss.imbue (the_out_locale);
oss.precision (15);
oss << f0 << f1 << f2 << f3;
std::clog << "Output is: `" << oss.str () << "'" << std::endl;
std::clog << "Done." << std::endl;
}
{
std::clog << "Read from to some string buffer..." << std::endl;
std::string the_string = "(3.14159;3.14159)(-inf;-inf)(inf;inf)(nan;nan)";
std::clog << "Input is: `" << the_string << "'" << std::endl;
std::locale the_in_locale (the_default_locale, new boost::math::nonfinite_num_get<char>);
std::istringstream iss (the_string);
iss.imbue (the_in_locale);
foo f0, f1, f2, f3;
iss >> f0 >> f1 >> f2 >> f3;
if (! iss)
{
std::cerr << "Format error !" << std::endl;
}
else
{
std::cerr << "Success !" << std::endl;
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
}
std::clog << "Done." << std::endl;
}
{
std::clog << "Serialize (boost text archive)..." << std::endl;
foo f0;
foo f1; f1.minus_infinity ();
foo f2; f2.plus_infinity ();
foo f3; f3.nan ();
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
std::locale the_out_locale (the_default_locale, new boost::math::nonfinite_num_put<char>);
std::ofstream fout ("test.txt");
fout.imbue (the_out_locale);
boost::archive::text_oarchive toar (fout, boost::archive::no_codecvt);
toar & f0;
toar & f1;
toar & f2;
toar & f3;
std::clog << "Done." << std::endl;
}
{
std::clog << "Deserialize (boost text archive)..." << std::endl;
std::locale the_in_locale (the_default_locale, new boost::math::nonfinite_num_get<char>);
std::ifstream fin ("test.txt");
fin.imbue (the_in_locale);
boost::archive::text_iarchive tiar (fin, boost::archive::no_codecvt);
foo f0, f1, f2, f3;
tiar & f0;
tiar & f1;
tiar & f2;
tiar & f3;
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
std::clog << "Done." << std::endl;
}
{
std::clog << "Serialize (boost XML archive)..." << std::endl;
foo f0;
foo f1; f1.minus_infinity ();
foo f2; f2.plus_infinity ();
foo f3; f3.nan ();
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
std::locale the_out_locale (the_default_locale, new boost::math::nonfinite_num_put<char>);
std::ofstream fout ("test.xml");
fout.imbue (the_out_locale);
boost::archive::xml_oarchive xoar (fout, boost::archive::no_codecvt);
xoar & BOOST_SERIALIZATION_NVP (f0);
xoar & BOOST_SERIALIZATION_NVP (f1);
xoar & BOOST_SERIALIZATION_NVP (f2);
xoar & BOOST_SERIALIZATION_NVP (f3);
std::clog << "Done." << std::endl;
}
{
std::clog << "Deserialize (boost XML archive)..." << std::endl;
std::locale the_in_locale (the_default_locale, new boost::math::nonfinite_num_get<char>);
std::ifstream fin ("test.xml");
fin.imbue (the_in_locale);
boost::archive::xml_iarchive xiar (fin, boost::archive::no_codecvt);
foo f0, f1, f2, f3;
xiar & BOOST_SERIALIZATION_NVP (f0);
xiar & BOOST_SERIALIZATION_NVP (f1);
xiar & BOOST_SERIALIZATION_NVP (f2);
xiar & BOOST_SERIALIZATION_NVP (f3);
f0.print (std::clog, "f0");
f1.print (std::clog, "f1");
f2.print (std::clog, "f2");
f3.print (std::clog, "f3");
std::clog << "Done." << std::endl;
}
std::clog << "Bye ! " << std::endl;
return 0;
}
/* end of test_nonfinite_num_facets_1.cpp */
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